用mscomm控件从计算机串口接受数据,inputmode=comInputModeBinary,
部分程序如下
Dim p As Variant
Dim a(4) As Byte
Select Case MSComm1.CommEvent
Case comEvReceive
p = MSComm1.Input
a(1) = p(0),程序运行到这里总说p(0)下标越界,用单步执行却没有问题,
何解?
部分程序如下
Dim p As Variant
Dim a(4) As Byte
Select Case MSComm1.CommEvent
Case comEvReceive
p = MSComm1.Input
a(1) = p(0),程序运行到这里总说p(0)下标越界,用单步执行却没有问题,
何解?
p = MSComm1.Input
a(1) = p(0)
p = MSComm1.Input
a(2) = p(0)
rst = a(1) * 16 + a(2)
i = i + rst
Next ct
当我去掉这个循环后,就不出错了,一旦加上,循环第一次后,第二次就说P(0)下标越界,是何原因?谢谢!
For ct = 0 To 9
p = MSComm1.Input
a(1) = p(0)
p = MSComm1.Input
a(2) = p(0)
rst = a(1) * 16 + a(2)
i = i + rst
Next ct
当我去掉这个循环后,就不出错了,一旦加上,循环第一次后,第二次就说P(0)下标越界,是何原因?谢谢!